Quick Fuel "Brawler" 570 CFM Carburetor. Quick fuel carburetors are amongst the highest quality carburetors on the market. They are hand assembled and engine tested here in the USA. Carburetor has been tumble polished for a beautiful long lasting shine. The BR-67253 is vacuum secondary with electric choke. Other standard features include dual metering blocks, screw in air bleeds, high speed bleeds, 4-corner idle, built-in sight glasses, tunable secondary opening rate and down leg boosters.